Optical part
US5638479A · kind A · utility
23Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1991 |
| Grant date | Jun 10, 1997 |
| Priority date | — |
| Expiry date | Dec 17, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The optical parts according to the invention have a feature of having smoothly coated surfaces for incident and emergent lights covered thereover with a light transmitting solid coating layer, and can be manufactured by a simplified process at least without needing polishing, together with the advantages of being weatherproof in atmosphere of high temperature and high humidity and antiozonant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.